Based on a lumped-parameter method, algebraic expressions for the stagnant thermal conductivity of some two-dimensional and three-dimensional spatially periodic media are obtained. The geometries under consideration include arrays of touching and non-touching in-line square and circular cylinders (two-dimensional), as well as touching and nontouching in-line cubes (three-dimensional). A comparison of results based on these algebraic expressions with existing numerical solutions and experimental data shows that they are in excellent agreement.
A Lumped-Parameter Model for Stagnant Thermal Conductivity of Spatially Periodic Porous Media
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Hsu, C. T., Cheng, P., and Wong, K. W. (May 1, 1995). "A Lumped-Parameter Model for Stagnant Thermal Conductivity of Spatially Periodic Porous Media." ASME. J. Heat Transfer. May 1995; 117(2): 264–269. https://doi.org/10.1115/1.2822515
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